Shoes For Crews Guard Unisex Mid Leather Waterproof S3 Boot. has a superior slip and clog resistant outsole plus TripGuard. The boots are waterproof, puncture resistant, metal free and have a Nano composite toe cap. Resistant to Penetration by bloodborne Pathogens. The boots have a removable cushioned insole (Recycled EVA) and recycled Polyester lining. A zipper allows the boot to be easily put on and taken off.